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22 * DEALINGS IN THE SOFTWARE.
25 #include "glsl_symbol_table.h"
27 class symbol_table_entry
{
29 DECLARE_RALLOC_CXX_OPERATORS(symbol_table_entry
);
31 bool add_interface(const glsl_type
*i
, enum ir_variable_mode mode
)
33 const glsl_type
**dest
;
39 case ir_var_shader_storage
:
42 case ir_var_shader_in
:
45 case ir_var_shader_out
:
49 assert(!"Unsupported interface variable mode!");
61 const glsl_type
*get_interface(enum ir_variable_mode mode
)
66 case ir_var_shader_storage
:
68 case ir_var_shader_in
:
70 case ir_var_shader_out
:
73 assert(!"Unsupported interface variable mode!");
78 symbol_table_entry(ir_variable
*v
) :
79 v(v
), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) {}
80 symbol_table_entry(ir_function
*f
) :
81 v(0), f(f
), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) {}
82 symbol_table_entry(const glsl_type
*t
) :
83 v(0), f(0), t(t
), ibu(0), iss(0), ibi(0), ibo(0), a(0) {}
84 symbol_table_entry(const glsl_type
*t
, enum ir_variable_mode mode
) :
85 v(0), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0)
87 assert(t
->is_interface());
88 add_interface(t
, mode
);
90 symbol_table_entry(const class ast_type_specifier
*a
):
91 v(0), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(a
) {}
100 const class ast_type_specifier
*a
;
103 glsl_symbol_table::glsl_symbol_table()
105 this->separate_function_namespace
= false;
106 this->table
= _mesa_symbol_table_ctor();
107 this->mem_ctx
= ralloc_context(NULL
);
110 glsl_symbol_table::~glsl_symbol_table()
112 _mesa_symbol_table_dtor(table
);
113 ralloc_free(mem_ctx
);
116 void glsl_symbol_table::push_scope()
118 _mesa_symbol_table_push_scope(table
);
121 void glsl_symbol_table::pop_scope()
123 _mesa_symbol_table_pop_scope(table
);
126 bool glsl_symbol_table::name_declared_this_scope(const char *name
)
128 return _mesa_symbol_table_symbol_scope(table
, -1, name
) == 0;
131 bool glsl_symbol_table::add_variable(ir_variable
*v
)
133 assert(v
->data
.mode
!= ir_var_temporary
);
135 if (this->separate_function_namespace
) {
136 /* In 1.10, functions and variables have separate namespaces. */
137 symbol_table_entry
*existing
= get_entry(v
->name
);
138 if (name_declared_this_scope(v
->name
)) {
139 /* If there's already an existing function (not a constructor!) in
140 * the current scope, just update the existing entry to include 'v'.
142 if (existing
->v
== NULL
&& existing
->t
== NULL
) {
147 /* If not declared at this scope, add a new entry. But if an existing
148 * entry includes a function, propagate that to this block - otherwise
149 * the new variable declaration would shadow the function.
151 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(v
);
152 if (existing
!= NULL
)
153 entry
->f
= existing
->f
;
154 int added
= _mesa_symbol_table_add_symbol(table
, -1, v
->name
, entry
);
163 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(v
);
164 return _mesa_symbol_table_add_symbol(table
, -1, v
->name
, entry
) == 0;
167 bool glsl_symbol_table::add_type(const char *name
, const glsl_type
*t
)
169 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(t
);
170 return _mesa_symbol_table_add_symbol(table
, -1, name
, entry
) == 0;
173 bool glsl_symbol_table::add_interface(const char *name
, const glsl_type
*i
,
174 enum ir_variable_mode mode
)
176 assert(i
->is_interface());
177 symbol_table_entry
*entry
= get_entry(name
);
179 symbol_table_entry
*entry
=
180 new(mem_ctx
) symbol_table_entry(i
, mode
);
181 bool add_interface_symbol_result
=
182 _mesa_symbol_table_add_symbol(table
, -1, name
, entry
) == 0;
183 assert(add_interface_symbol_result
);
184 return add_interface_symbol_result
;
186 return entry
->add_interface(i
, mode
);
190 bool glsl_symbol_table::add_function(ir_function
*f
)
192 if (this->separate_function_namespace
&& name_declared_this_scope(f
->name
)) {
193 /* In 1.10, functions and variables have separate namespaces. */
194 symbol_table_entry
*existing
= get_entry(f
->name
);
195 if ((existing
->f
== NULL
) && (existing
->t
== NULL
)) {
200 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(f
);
201 return _mesa_symbol_table_add_symbol(table
, -1, f
->name
, entry
) == 0;
204 void glsl_symbol_table::add_global_function(ir_function
*f
)
206 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(f
);
207 int added
= _mesa_symbol_table_add_global_symbol(table
, -1, f
->name
, entry
);
212 ir_variable
*glsl_symbol_table::get_variable(const char *name
)
214 symbol_table_entry
*entry
= get_entry(name
);
215 return entry
!= NULL
? entry
->v
: NULL
;
218 const glsl_type
*glsl_symbol_table::get_type(const char *name
)
220 symbol_table_entry
*entry
= get_entry(name
);
221 return entry
!= NULL
? entry
->t
: NULL
;
224 const glsl_type
*glsl_symbol_table::get_interface(const char *name
,
225 enum ir_variable_mode mode
)
227 symbol_table_entry
*entry
= get_entry(name
);
228 return entry
!= NULL
? entry
->get_interface(mode
) : NULL
;
231 ir_function
*glsl_symbol_table::get_function(const char *name
)
233 symbol_table_entry
*entry
= get_entry(name
);
234 return entry
!= NULL
? entry
->f
: NULL
;
237 symbol_table_entry
*glsl_symbol_table::get_entry(const char *name
)
239 return (symbol_table_entry
*)
240 _mesa_symbol_table_find_symbol(table
, -1, name
);
244 glsl_symbol_table::disable_variable(const char *name
)
246 /* Ideally we would remove the variable's entry from the symbol table, but
247 * that would be difficult. Fortunately, since this is only used for
248 * built-in variables, it won't be possible for the shader to re-introduce
249 * the variable later, so all we really need to do is to make sure that
250 * further attempts to access it using get_variable() will return NULL.
252 symbol_table_entry
*entry
= get_entry(name
);